import java.util.HashSet;
import java.util.Set;

public class Demo {

    public static void main(String[] args) {
        Thread t= new Thread(){
            @Override
            public void run() {
                super.run();
            }
        };
        Runnable r=new Runnable() {
            @Override
            public void run() {

            }
        };
    }
}
